Stop mechanism for punch-presses.



A. L. DAY.

STOP MEGHANISM FOR PUNCH PRESSES.

APPLICATION FILED MAR. 23,1 912- Patented Apr. 24, 1917.

A. L. DAY.

STOP MECHANISM FOR PUNCH PRESSES.

APPLICATION FILEUMAR. 23. |912.

,223,770. Patented Apr. 24, 1917.

i579@ fyi y s sums-sneer 2.

mf .www5 persas co4. imam-umm msnmcmN. n c.

A. L. DAY.

sToP Mr-:cHANlsM FOR PUNCH PRESSES. y

Patented Apr; 24, 1917.

a fuk@ A. L. DAY.

STOP MECHANISM FR PUNCH PRESSES.

' 'm' Patented Apr. 24,1917.

5 SHEETS-SHEEf 4.

mllllll llllllllll j NID A. L. DAY.

STOP MEcHANlSM FOR PUNCH PRESSES.

APPLICATION FILED MAR. 23, 1912. 1,223,776. Patented Apr. 24,1917.

@NIT S @FME ALFRED L. DAY, OF CHICAGO, ILLINOIS, ASSIGNOR TO AMEBICAN-PERFORATOR COM-a PANY, OF CHICAGO, ILLINOIS, A CORPORATION E ILLINOIS;

STOP MECHANISIVI FOR PUNCH-PRESSES.

Specification of Letters Patent.

Patented apr. 2a, ier?.

Application filed March 23, 1912. Serial No. 685,826.

To all whom t may concern.'

Be it known that I, ALFRED L. DAY, a

citizen of the United States, residing atv Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Stop Mechanism for Punch- Presses, ofwhich the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention pertains to punch presses, and particularly relates to that type of punch press employed for perforating paper, cards, blanks, andthe like.

It is an object of my invention to provide a punch press having a simple and durable mechanism for insuring that only one operation of the pressy shall take place on each occasion that the press clutch is tripped.

I have shown in the accompanying drawings, and described in the following speciiication, a punch press, constructed in accordance with my invention, for consecutively numbering sheets of paper, cards, or the like. The construction shown, is, however, only one of those in which my invention may be embodied, and changes may be made in this construction without exceeding the scope of my invention, as defined in the appended claims.

In the drawings:

Figure 1 is a side elevation of the punc press;

Fig. 2 is a rear view of the same, partly in section, the section being taken on the line 2 2 of F ig. 1;

Fig. 3 is a front view of the top portion of the punch press;

Fig. 4 is a sectional elevation of the clutch tripping mechanism, the section being taken on the line 4 4 of Fig. 1, looking in the direction of the arrows;

Fig. 5 is a sectional elevation of the clutch tripping mechanism, the section being taken on the line 5-5 of Fig. 1;

Fig. 6 is a longitudinal section through the top part of the punch pres-s;

Fig. 7 is a detail sectional View showing the clutch;

Fig. 8 is a detail sectional view showing the trip for actuating the advancing mechanism, the section being taken on the line 8-8 of Fig. 6;

Fig. 9 is a side elevation of the controlling wheels for the perforator punches, and of the means for periodically advancing such wheels; v

Fig. 10 is an end view of said controlling wheels, a portion of the frame for supporting the same being removed; and

Fig. 11 is an end view of the reciprocating slide for effecting the periodical advancing of the controlling wheels.

Referring now 'to the drawings, in which like reference characters refer to like parts throughout the several ngures, 12 indicates a stand, upon the upper end of which is mounted a bracket 13, bearing at its upper end a bearing 14 in which is rotatably mounted the punch-actuating shaft-15. The shaft 15 is formed, at its front end, with an eccentric portion 16 which cooperates, in the ordinary manner, with the punch head 17. The punch head 17 carries the controlling wheels for the perforating punches, which controlling wheels operate substantially in the same manner as those described in my Letters Patent No. 1,003,993, except that they are arranged to be periodically advanced in a manner to be hereinafter described. Upon the rear end of the shaft 15 is mounted, so as to be freely rotatable thereon, a fly wheel 18, which is connected, as by means of a belt 19, with a continuously driven counter-shaft. In the construction shown in the drawings, said counter-shaft derives its movement from an electric motor 20. Tripping means are provided whereby the fly wheel 18 may be operatively connected at will with the shaft 15, upon which it isu normally freely rotatable. When such 'operative connection is made, the shaft 15 will rotate with the ily wheel, and the punch head 17 willy descend and rise again. The tripping means is so constructed that, when it has been operated, the shaft 15 can make but one revolution, it being necessary for the tripping means to be operated again before the shaft 15 can make another revolution. The construction of the tripping means is as follows:

The hub 21 of the fly wheel 18 is formed, at its inner side, with an annular shoulder 22, within which fits, so as to be freely rotatable therein, a shoulder 23 carried by a collar 24, which is fast upon the shaft 15. Rockably mounted in the collar 24 is a pin 25 (Figs. 4-7), the outer end of which carries a trigger 26. The trigger 26 is formed with shoulders 27 and 28 respectively, one or the other of which is adapted to engage the adjacent surface of the collar 24, which shoulders serve to limit the rocking movement of the pin 25 in one direction or the other. A spring 29 is connected between the trigger 26 and the collar 24, and tends to rock the pin 25 into the position in which the shoulder 28 of the trigger 26 engages against the collar 24, the trigger being, however, normally prevented from moving into such position by a device to be described below. At its rear end, the pin 25 is cut away (Figs. 6 and 7) so as to form a catch portion 30 of semi-circular cross section, the flat surface of said catch portion being substantially a continuation of the outer' surface of the shoulder 23 of the collar 24. The inner wall of the annular shoulder 22 of the fly wheel is cut away at 31, so as to form an abutment 32 adapted to engage the edge of the catch portion 30 of the pin 25, when the pin is rocked into the position shown in dotted lines in Fig. 7. As will be hereinafter described, the trigger 26 is normally held in the position shown in Figs. 4 and 5, the catch portion 30 being then in the position shown in full lines in Fig. 7 and, with the parts in these positions, the fly wheel can rotate freely upon the shaft 15. Vhen,

however, the spring 29 is permitted to exertV its action upon the trigger 26, it will tend to move the trigger into the position in which the shoulder 28 thereof engages the collar 24. The spring 29 may not be able, at first, to effect movement of the trigger, owing to the fact that the corner of the catch portion 30 of the pin 25 will engage against lthe inner surface of the annular shoulder 22. vVhen, however, during the rotation of the fly wheel, the cut away portion 31 of the shoulder 22 comes opposite the catch portion '30, the pin 25 and the trigger 26 will be permitted to rock into the position shown in dotted lines in Fig. 7, and the abutment 32 will then engage against the corner of the catch portion 30. lBy the engagement of the abutment 32 with the catch portion 30, the fly wheel becomes locked to the collar 24, the effect being-that the y wheel will carry the collar 24 and the shaft 15 with it during its further revolution. Then the pin 25 is rocked back into the position shown in Figs. 447, the fly wheel will again be free to rotate upon the shaft 15.

Movably mounted in suitable guides of the stand 12 and bracket 13, is a vertical rod 33 which is normally pressed upward by a spring 34, but which may be depressed by means of a treadle 35. rlhe upper end of the rod 33 normally engages in front of the trigger 26, and holds the latter inthe position shown in Figs. 4 and 5.' When, however, the rod 33 is depressed by means of the treadle 35, the spring 29 is allowed to exert its influence upon the trigger 26, and the clutch is thrown in, in the manner described above, power being thereupon transmitted from the fly wheel to the shaft 15. lt will be seen that, if the rod 33 should be depressed and held depressed, the clutch would ordinarily remain in its operative condition, and the press would continue to make operative movements until the rod 33 should be allowed to rise again. This is undesirable, and I have provided mechanism for insuring that the shaft shall only rotate once after the rod 33 has been depressed, so that the rod 33 must be depressed for each operative movement of the press. rEhe construction of this mechanism will now be described.

A horizontal latch pin 36 is slidably mounted in the bracket 13, and is provided with a spring 37 which tends to move the latch pin in a rearward direction, into the path of the trigger 26. The latch pin is also provided with a stop 38, against which engages one arm of a'pivoted bell crank lever 39. Theother arm of the bell crank lever 39 is engaged by a stop 40 carried by the rod 33. The arrangement is such that, when the rod 33 is moved upward by its spring 34, its stop 40 will effect a rocking movement of the bell crank lever 39, which will result in the latch pin 36 being moved inward against the action of its spring 37. lvhen, however, the rod 33 is depressed, the spring 37 of the latch pin 36 is permitted to move the latter outward.

Pivoted upon the front surface of the trigger 26, is a guard plate 41 which slightly overlaps the surface of the trigger. A stop 42, carried by the trigger, engaging within a notch 421 formed in the guard plate, lim-A its the movement of the guard plate to a movement from the position shown in Fig. 4 to a position in which the front edge of the guard plate forms a continuation of the front surface of the trigger. A leaf spring 3'is secured to the rear face of the trigger 26, and serves to hold the guard plate 41 normally in the position shown in Fig. 4.

The operation of the tripping mechanism is as follows: As has been said, the rod 33 is normally held, by its spring 34, in the path of the trigger 26, so as to prevent the trigger from being pulled forward by the spring 29 and thus tripping the clutch. l/Vith the parts in this position, the clutch is in its disconnected condition, and the fly wheel 18 can rotate freely upon the shaft 15. When it is desired to perforate a sheet, the rod 33 is depressed by means of the treadle 35, the effect being that the upper end of the rod 33 passes out of the way of the trigger 26, and enables the spring 29to exert its influence upon the trigger, thus effecting the throwing-in of the catch. The shaft 15 then participates in the rotation of the fly wheel 18, and the punch head is caused to descend and rise again.

When the rod 33 is depressed, the latch pin 36 is thereby permitted to move outward under the influence of its spring 37. The latch pin, being obstructed by the overlapping front edge of the guard plate 41, cannot enter in front of the trigger, but merely engages the surface of the guard plate 41 until the trigger has moved forward, whereupon the latch pin snaps in behind the trigger. rThe clutch connection having been made, as described above, the trigger will, of course, be carried around by the collar 124; but, as soon as it has almost completed its revolution, the front edge of its guard plate 41 will strike the end of the latch pin 36, which latter will be in the path of the trigger, it being assumed that the foot has not been removed from the treadle 35 after depressing the rod 33. After the front edge of the guard plate has struck the end of the latch pin 36, the continued rotation of the collar 24 will result in the guard plate 41 being pressed back, against the action of the leaf spring 43, until the front edge of the guard plate is flush with the front face of the trigger. When this has occurred, the trigger can move no farther, and is therefore pressed back with respect to the collar 24, against the action of the spring 29. When the trigger 26 has been pressed back sufficiently for the corner of the catch portion 30, to move out of the path of the abutment 32, the clutch is released, and the collar 24 comes to a standstill, a brake 44, adapted to be adjusted by means of a set screw 45, being provided to that end. When the treadle 35 is released, and the rod 33 is consequently raised by its spring 34, the catchpin 36 is forced back out of the path of the trigger, by the action of the bell crank lever 39, the rod, however, taking its place in front of the trigger 26. As the catch pin 36 passes away from the front of the trigger 26, the guard plate 41 snaps back into the position shown in Fig. 4, the parts being thereby returned into position ready for another operation of the tripping mechanism. It will be understood that the operator is intended to release the treadle as soon as he has tripped the clutch, and that the operation, as described above, will only take place when he has failed to release the treadle soon enough for the rod 33 to be returned to its place in front of the trigger.

26 before the latter has completed its revolution. The construction effectually prevents the collar 24 and shaft 15 from making more than one revolution for any oneA wheels described in my Letters Patent No.

1,003,993, referred to above. Thesewheels are connected and arranged so as to cooperate with a swinging frame 47, adapted, when swung, to advance the wheels to a predetermined eXtent. The construction of the frame 47 and the arrangement of the controlling wheels 46 to enable them to be periodically advanced thereby, is well known in numbering machines and the like and need not be described here. It is sufficient to say that, at each swinging movement of the frame 47 one of the controlling wheels is moved forward to a predetermined extent, and, when such wheel has been moved through a complete revolution, the next succeeding wheel is moved forward to a predetermined extent, and so on. The frame 47 is provided with a well known adjusting device 475, enabling it to be adjusted so that the controlling wheels may be advanced once for each of a predetermined number of movements of the swinging frame, instead of once for each movement thereof, and enabling the swinging frame to be thrown out of operation entirely, when desired.

The swinging frame is provided with an ear 48, which is connected, by means of a link 49, with a pin 50, carried by a slide 51 mounted in suitable guides 52 in the end of the bracket 13 adjacent the punch head 17. It will be seen that a reciprocating movement of the slide 51 will result in a corres ondin swin in movement of the swinffing frame 47; so that each reciprocating movement of the slide 51 will result in the advance of the controlling wheels 46, providing the adjusting device 47l has been set with that end in view. rlfhe reciprocating movement of the slide 51 is effected by means of a crank pin 53, carried by a crank disk 54 mounted upon the end of a hori- Zontal spindle 55, which is rotatably mounted in suitable bearings carried by the bracket 13. It will be seen that each rotation of the spindle 55 results in a to and fro movement of the slide 51, and a consequent advance of the controlling means. The shaft 55 is connected with the fly wheel 18 so as to be caused thereby to make one revolution for each 'revolution of the shaft 15, the movement of the spindle 55 occurring im- 'mediately after the rotation of the shaft 15 has been completed, the effect being that the controlling wheels are advanced immediately after each perforating operation. The manner of effecting this will now be described.

Secured upon the shoulder 22 of the fly wheel 13, and fast to the fly wheel is a gear wheel 56, having a portion of the teeth thereof cut away as at 57 (Fig. 4), the cut away portion 57 being located opposite the clutch abutment 32. Secured to the rear end of the spindle 55 is a corresponding gear wheel 58 having a portion of the teeth thereof cut away at 59. When the shaft 55 is at rest, the cut away portion 59 is situated at the top of the gear wheel 58. Secured to the collar 24 is a plate 60 having an outwardly extending finger 6l; and the gear wheel 58 is provided, at the cut away portion, with a plate 62 having an outwardly extending finger 63, located adjacent the cut away portion 59, which coperates with the finger 61 in the'following manner: In the normal condition of the parts, the finger 6l is situated immediately in front of the finger 63, and, the cut away portion 59 of the gear wheel 58 being immediately Vopposite the teeth of the gear wheel 56, the gear wheel 56 can rotate without affecting the gear wheel 58. 1When the clutch is thrown in, by reason of the rod 88 being depressed, the collar 2a begins to rotate, and the finger 61 is carried away from the finger 63. Just before the collar 24: has completed its rotation, however, the finger 6l strikes the finger 68, on the right hand side thereof (Fig. 8) and causes the gear wheel 58 to move slightly in a contra-clockwise direction. rIhis slight movement is sufficient to cause the teeth of the gear wheel 58 to mesh with those of the gear wheel 56, it being understood that the cut away portion 57 of the gear 56 is always coincident with the finger 6l when the clutch is in connected position. As soon as the teeth of the wheel 58 are made to mesh with those of the wheel 56, the wheel 58 will, of course, participate in the rotation of the wheel 56, and the spindle 55 will be rotated through one revolution. As soon as the revolution has been completed, the finger 63 will strike against the finger 61 of the collar 24, the latter having stopped immediately after throwing the teeth of the wheels 56 and 58 into mesh. The gear wheel 58 will then stop, the cut away portions 57 and 59 having, by that time, come opposite each other. lVhen the rod 88 is again depressed, the same result will recur. It will be seen, therefore, that the shaft 55 is caused to make one revolution immediately after the shaft l5 has completed its revolution, the effect being that the controlling wheels are advanced -immediately after each perforating operation.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

l. In a punch press, a rotatable operating shaft, a driving wheel therefor, a clutch mechanism for connecting and disconnecting said shaft with respect to said wheel, comprising a member carried by said shaft and movable relative to said shaft which connects and disconnects the said shaft from the wheel; means tending to move said member to connecting position; an abutment movable into and out of the path of said member, said abutment, when in the path of said member,stopping it in disconnecting position, and a safety device for preventing the shaft from making more than one revolution, when the abutment is moved out of the path of said member, said device comprising a stop movable into and out of the path of said member, said stop when in the path of said member, stopping said member, in the same position in which said abutment stops it.

2. In a punch press, in combination, an operating shaft; a driving wheel therefor; a clutch mechanism for intermittently connecting said driving wheel with said shaft, said clutch mechanism including a clutchtripping member movably mounted on said shaft, means tending to hold said clutchtripping member in the position in which clutch connection is made between said driving wheel and said shaft, and a vertically movable abutment movable into and out of the path of said member so as to cause the clutch to be thrown out and in respectively, whereby, when said abutment is moved out of the path of said member, said member will rotate with said shaft; and a safety device for preventing said shaft from making more than one revolution, said safety device comprising a horizontally movable stop adapted to enter behind said member after said abutment has been moved out of the path of the same and the same has consequently started to revolve, and remain in the path of said member until said abutment is moved back into the path of the same; and means for connecting said stop with said abutment so that the movements of said abutment into and out of the path of said member will effect the said movements of said stop.

8. In a punch press, in combination, an operating shaft; a driving wheel therefor; a clutch mechanism for intermittently connecting said driving wheel with said shaft, said clutch mechanism including a clutchtripping member movably mounted on said shaft, means tending to hold said clutchtripping member in the position in which clutch connection is made between said driving wheel and said shaft, and a vertically disposed abutment movable into and out of the path of said member so as to cause the clutch to be thrown out and in respectively, whereby, when said abutment is moved out of the path of said member, said member will rotate with said shaft; and a safety device for preventing said shaft from making 'more than one revolution, said safety device comprising a movable stop, disposed at an angle to said abutment, and adapted to enter behind said member after said abutment has been moved out of the path of the same and the same has consequently started to revolve, and remain in the path of said member until said abutment is moved back mesmo into the path of the same; and a bell crank lever engaging said abutment and said stop so as to impart the said movements to said stops.

4. In a punch press, in combination, an operating shaft; a driving wheel therefor; a clutch mechanism for intermittently connecting said driving wheel with said shaft, said clutch mechanism including a clutchtripping member movably mounted on said shaft, means tending to hold said clutchtripping member to the position in which clutch connection is made between said driving wheel and said shaft, and an abutment movable into and out of the path of said member so as to cause the clutch to be thrown out and in respectively, whereby, when said abutment is moved out of the path of said member, said member will rotate with said shaft; and a safety device for preventing said shaft from making more than one revolution, said safety device comprising a stop movably connected with said movable abutment, and adapted to enter behind said member after said abutment has been moved out of the path of the same, and remain in the path of said member until said abutment is moved back into the path of the same; and means for preventing said stop from entering in front of said member before the same has started to revolve.

5. In a punch press, in combination, an operating shaft; a driving wheel therefor; a clutch mechanism for intermittently connecting said driving wheel with said shaft, said clutch mechanism including a clutchtripping member movably mounted on said shaft, means tending to hold said clutchtripping member in the position in which clutch connection is made between said driving wheel and said shaft, and an abutment movable into and out of the path of said member so as to cause the clutch to be thrown out and in respectively, whereby, when said abutment is moved out of the path of said member, said member will rotate with said shaft; and a safety device for preventing said shaft from making more than one revolution, said safety device comprising a stop movably connected with said movable abutment, and adapted to enter behind said member after said abutment has been moved out of the path of the same, and remain in the path of said member until said abutment is moved back into the path of the same; and a guard plate movably mounted upon the face of said member adjacent to said stop, so as to prevent said stop from entering in front of said member` before the latter has started to revolve.

6. In a punch press, in combination, an operating shaft; a driving wheel therefor; a clutch mechanism for intermittently ccnnecting said driving wheel with said shaft, said clutch mechanism including a clutchtripping member movably mounted on said shaft, means tending to hold said clutchtripping member in the position in which clutch connection is made between said driving wheel and said shaft7 and an abutment movable into and out of the path of said member so as to cause the clutch to be thrown out and in respectively, whereby, when said abutment is moved out of the path of said member, said member will rotate with said shaft; and a safety device for preventing said shaft from maln'ng more than one revolution, said safety device comprising a stopmovably connected with said movable abutment, and adapted to enter behind said member after said abutment has been moved out of the path of the same, and remain in the path of said member until said abutment is moved back into the path of the same; and a spring pressed guard plate mounted upon the face of said member adjacent said stop and overlapping the front of said member, so as to prevent said stop from entering in frontl of said member before the latter has started to revolve.

In witness whereof, I have hereunto subscribed my name in the presence of two witnesses.

CHARLES G. Corn, MABEL REYNOLDS.

@epics of this patent may be obtained for nve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

